GO-2026-5017

    Dashboard / Vulnerabilities / GO-2026-5017

    GO-2026-5017

    Published: 22 May 2026Last Modified: 5 Aug 2026

    Summary: Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh

    Details: A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

    References: https://go.dev/issue/79564, https://groups.google.com/g/golang-announce/c/a082jnz-LvI, https://go.dev/cl/781640, https://go.dev/cl/781664

    Affected packages

    Package

    Name: golang.org/x/crypto

    Purl: pkg:golang/golang.org/x/crypto

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -0.52.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High